Warp stop motion for looms



Feb. 24, 1925.

1,527,196 H. E. KHOU RY `WAR? sToP MOTION FOR Looms Filed may 5, 1924 2`Sneets-Sheet 1A Qwmmtoz Feb. 24. 1925.

H. E. KHOURY wARP srolorron VPon Looms Patented Fels. 24, T925.

mirra!) STATES HAB-RY E. KHOURY, OF NEW BEDFORD, MASSACHUSETTS.

WARP STOP MOTION FOR LOOMS.

Application filed May 5, 1924. Serial No. 711,153.

To all whom t may concern y Be it known that HARRY E. KHOURY, a citizen of Syria, a protectorate of France, residing at New Bedford, in the lcounty of Bristol and State of Massachusetts, has invented new and useful improvements in llVarp vStop Motions for Looms, of which the following is a specification.

rlhe present invention relates to warp stop motions for looms, and more particularly to thattype of stop motionswherein the harness or shed-forming heddles perform the additional function of detector wires, which serve to stop the loom whenever one of the warp threads breaks.

rlhe invention relates to the type of mechanism disclosed in my co-pending application, Serial No. 606,194, filed December l1, 1922, which shows a stop motion comprising a rockable bar mounted in each of the heddle frames and adapted to be rocked as the frames are reciprocated vertically in the loom operation. rfhe mechanism also embodies means upon the loom, which effects rocking of the bar and also serves to maintain a power operated knock-off mechanism inoperative. The bar rocking means is connected with the knock-ofiI mechanism so that upon the locking of the bar against rocking movement when one of the warp threads, breaks, the knock-off mechanism is rendered operative and the iooin stopped.

The present invention is an improvement upon the structure disclosed .in my co-pending application, in that it 'discloses a sinipliiied means for rendering the knock-oilq mechanism operative when one of the rocking bars in the heddle frames is locked against rocking movement.

An object of the invention is to provide a warp stop motion of simple construction, which will be positive and unf-ailing in operation. These and ether objects of the invention, such as the provision of a mechanism which may be readily attached to a loom, and which may be cheaply manufactured, will become apparent as the description proceeds in connection with the preferred embodiment disclosed in the accompanying drawings, wherein:

Figure 1 is a vertical section of a loom taken through the heddle frames and looking toward one side,

Figure 2 is' a top plan view of the mechanism shown in Figure V1,

Figure 3 is an enlarged detail view of the knock-oft' mechanism, l

Figure 4 is a vertical section on the line 4,-4 of Figure 3, looking in the direction of the arrows,

Figure 5 is an enlarged detail of the knock-olf mechanism, showing the relative positions of the parts when the knock-off mechanism is operative, and

Figure 6 is an end view of the mechanism shown in Figure 5, with the parts in the position indicated in that figure.

Referring to the drawings for a more detailed description, 10 indicates a portion of one of the side frame pieces of a loom, in which is mounted a drive shaft 11 carrying fast and loose pulleys 12, a driving belt 13 being shiftable by means of a lever 14 mounted upon a bracket 15. One end of the lever is forked, as at 16, and it isoperated by means of a shipper lever 17, which is movable laterally to be seated in a recess 18 in a slotted bracket when the belt is upon the fast pulley for the operation of the mechanism. The loom also includes the usual harness frames 19, l20, which are vertically reciprocated, as will be understood, as. by a harness strap 21, passing over sheaves 22. Non-circular rock shafts 23 are mounted in the frames and extend through shedforming heddles 24, which are provided with loops 24', having narrowed portions 24". l/Vhen a warp thread breaks and the heddle drops, the narrowed portions 24 lit over the non-circular rock shafts 23 and lock the latter against rocking movement. As will be understood, the heddles are supported by the warp threads as long as the threads are unbroken or not too slack, and it is only upon dropping of one of the heddles that the rock shaft will be locked againstmovement. It is thought that no detailed description of the operation of the heddles or the loom is necessary, since this much of the mechanism is old and well known in the art, and is disclosed and described in detail in my co-pending application, referred to above.

It will be noted that each rock shaft 23 eX- tends beyond the frame and carries 'an arm 25 adapted to engage an arm or pin 26 upon a rock shaft 27 supported upon the loom frame in bearings 29 formed upon vertical bracket arms 28. The bracket arms extend through eyes 30 in horizontal bracket arms 31, and are held in position by set screws 32.

The bracket arms 31 are mounted upon a longitudinally movable rod 33, which has one end extending through a bracket 34 upon the frame and provided with a laterally deflected portion 33 to form a hook adapted to engagethe shipper level' 18. when the rod is moved toward the right, as viewed in Figure 2. VAt its opposite end, the rod 33 has threaded thereon a loop 35, which is pivotally connected to a lever 36 fulcrumed at 37 upon a bracket plate 38, suitably supported upon the frame. The rod 33, together with the lever 36, constitute a portion of the knock-off mechanism, which is `power actuated from the drive shaft ll.

The lever 36, which constitutes a normally stationary memberI of the knock-off mechanism carries a pawl or finger 39, having a depending shank portion 39, and a shoulder 40. The finger is pivotally supported upon the lever by means of a pin 4l, extending through an opening 42 in an ear 43 projecting laterally from the lever. The finger is free to swing about its pivot pin 4l and has its shoulder normally depressed, as indicated in Figure 3, by means of a detent 44, upon the end of the rock shaft 27. has a shank portion 45 formed with an eye 46 intov which fits the shaft 27, a set screw 47 serving to maintain the detent in fixed position upon the shaft. The detent is held in engagement with the finger 39 by means of a coil spring 43, one end of which projects into a collar 49 upon the rock shaft, the

other end of the same engaging the bracket arm 29. In this manner the spring is suitably tensioned to hold the detent 44 above the shoulder 40A of the linger and retain the latter in its normal position indicated in Figure 1. The linger 39 is also a portion of the knock-off mechanism and is adapted to be engaged by a lug 50 carried by a continuously moving lever 51 pivoted at 52 upon the plate 38. rlhe lever is actuated through a pitman 53, which extends through a guide bracket 54, and at its lower end is pivotally connected, as at 55, to the end of a cam lever 56 pivoted upon the frame 56 and carrying a cam block 57 engaging a heart-shaped cani 53 upon a counter shaft 59 suitably driven from the shaft l1 by gearing indicated in dotted lines. The cam block 57 is urged toward the cam by means of a coil spring 60 surrounding the pitman, and, as will be understood, rotation of shaft 59 results in reciprocation of pitman 53 and operation of lever 5l. As the lever 5l is moved about its fulcrum 52, the lug 50 clears the end of the finger 39, and thus the knock-olf mechanism is inoperative. The rock shaft 27 and detent 44 are maintained in the position shown in Figures l, 3 and 4 while no warp threads are broken. Under these conditions the heddle frames moveup and down, and engagement of the arms v25 with armsor pins The detentv 26 upon the rock shaft 27 as the heddle frames descend, serve to rock the bars 23, the arms moving upwardly as they engage the pins 26. As the heddle frames ascend, the rock shafts may be returned to lower the arms 25, either by gravity or suitable spring means, such as is disclosed in my copending application. However, should one of the warp threads break, its heddle drops and locks the bar 23 against rocking movement. Upon the next descent of the heddle frame, engagement of the arm 25 upon the rock bar with the pin or arm 26 upon the rock shaft 27, will rock the shaft 27 in opposition to the spring 48 and throw the detent 44 to the position indicated in Figure 6.A

Movement of the detent 44 from the position shown in Figure 4 to its position indicated in Figure 6 is limited by means lof a stop collar 65, mounted upon the rock shaft 27 having a finger portion 65 projecting longitudinally of the shaft and adapted upon rocking movement of the shaftV 27 to engage a bracket arm 28. This movement of the detent will at once release the finger 39 and permit the weight of the shank 39 of the same to swing the shoulder 40 of the finger into the path of the lug 50. Upon the next upward movement of the lever 5l of the knock-off mechanism through pitman 53, the lug 50 will engage the shoulder 40 of finger 39 and move the lever 36 to the right, as viewed in Figures l and 3. The engagement of the lug and finger is shown in Figure 5, and as the lever 36 is moved to the right, movement in the same direction is imparted to rod 33, to which the lever is connected, thereby causing engagement of the end of the rod 33 with the shipper lever 1,7 and permitting the actuating spring i7 to shift the belt 13. A coil spring 33 serves to return the lever 36 and rod to its normal position after the shipper lever has been thrown, and the stop collar 34', by engaging the bracket 34, limits the movement of the rod 33 under the influence of the spring 33".

lt should be understood that numerous modifications may be made in the embodi-` ment of the invention illustrated in the accompanying drawings without departing from the gist of the invention. As will be observed, the knock-off mechanism'has power actuated from cam 58 upon shaft 59 and comprises the continuously moving lever 5l, carrying the lug 50, which, when any one of the warp threads breaks, serves to actuate the shipper lever. The lug 56, however, is normally disconnected from the remaining portion of the knock-off mechanism, namely, the lever 36 and rod due to the fact that the normally stationary interposed linger 39 is held in an inoperative position by means of the detent 44. Once t-hedetent is released, however, due to the locking of one of the rock shafts 23 in one of the heddle trames, the finger swings of its own weight to the operative position shown in Figure and the shoulder Lt() thereon is thus moved into lthe path of the lug 50. lt' desired, the end ist or the detent may be bevelled (Fig. 6) so that as the detent is returned to its operative position (Fig. at) under the influence of spring e8, after it has once been moved to release linger 39, the detent will automatically depress the linger 39 and thus return the same to an inoperative position. rl"he parts oi the knock-ott mechanism.) are thereby automatically reset, due to the pro lsion of spring 33, which returns the lev 36 and rod 313 and the spring t-B, which ret-urns the detent and ringer 39. llilith the parts thus reset, after the operator has connected the ends or" the broken warp thread, the shipper lever 18 may be manually swung to return the belt 13 to the fast pulley and thereby resume the operation of the loom.

l claim:

l. ln a warp stop motion for looms, the combination with the heddle frame and shed-forming heddles, of a rockablebar associated with the heddles and mounted in the heddle trame, the heddles being formed to lock the bar agaii'ist rocking movement when one or the warp threads breaks, normally stationary means on the loom adapted to rock the bar as the heddle 'frame moves, and power actuated means to stop the loom, said stop means being positively maintained inoperative to stop the loom through connections with said bar rocking means as long as the bar is free to rock.

2. ln a warp stop motion for looms, the combination with the heddle frame and shed-forming heddles, of a rockable bar associated with the heddles and mounted in the heddle trame, the heddles being formed to loci-1 the bar against rocking movement when one ot the warp threads breaks, normally stationary movable means on the loom adapted to rock the bar as the heddle trame moves, and power actuated means to stop the loom, said stop means being positively maintained inoperative 'to stop Ythe loom through connections with said bar rocking` means as long as the bar is Jfree to rock.

In a warp stop motion for looms, the combination with the heddle trame and shed-forming heddles, of a rockable bar associated with the heddles and mounted in the heddle trame, the heddles being formed to lock the bar against rocking movement when one of the warp threads breaks, normally stationary movable means on the loom adapted to engage and rock the bar as the heddle trame moves, and power actuated means to stop the loom, said stop means being positively maintained inoperative to stop the loom through connections with said bar rocking means as long as the bar is free to rock.

Ll. ln a warp stop motion for looms, the combination with a heddle frame and shedforming heddles, ot a rockable bar associated with the heddles and mounted in the heddle iframe, the heddles being formed to lock the bar against rocking movement when one or the warp threads breaks, normally stationary movable means on the loom adapted to rock said bar as the heddle frame moves. power actuated means to stop the loom, said stop means including a continuously moving member, a relatively stationary member, a connection between said members adapted to be maintained inoperative, and means actuatable through said bar rockin` means to render said connection operative, said bar serving when locked to actuate said last mentioned means.

5. In a. warp stop motion for looms, the combination with the heddle iframe and shed-forming' heddles, of a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one of the warp threads breaks, normally stationary movable means on the loom adapted to rock said bar as the heddle frame moves, power actuated means to stop the loom, said stop means including a continuously moving member, a relatively stationary member. a connection between said members adapted to be held in inoperative position, and means operative through said bar rocking means to release said connection, said bar servingl when locked to operate said last mentioned means.

6. In a warp stop motion for looms, the combination with the heddle frame and shed-forming heddles, of a rockable bar associated with the heddles and mounted in the heddle trame, the heddles being formed to lock the bar against rocking` movement when one of the warp threads breaks, means on the loom adapted to rock the bar as the heddle trame moves, power actuated means to stop the loom including a continuously moving member, a stationary member connected with the loom shipper lever, a normally stationary nger connected with said stationary member and adapted to be engaged by said continuously moving member, means for normally maintaining,- said linger out of engagement with said moving` member, said last mentioned means being operable through said bar rocking` means to permit the finger to be engaged by said moving` member when said bar is locked.

7. ln a warp stop motion tor looms, the combination with the heddle frame and shed-forming' heddles, of a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement lll) when one of the Warp threads breaks, normally stationary movable means on the loom adapted to rock the bar as the heddle frame moves, power actuated means to stop the loom including a continuously moving member, a stationary member connected With the loom shipper lever, a normally stationarvV linger connected with said stationary membei' and adapted to be engaged by said con tinuously moving member, and means for normally maintaining said finger out ot engagement with said moving member, said last mentioned means being operable through said bar rocking means to permit the linger to be engaged by said moving member when said bar is locked.

8. ln a vvarp stop motion for looms, the combination with the heddle trame and shed-forming heddles` of a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one ot' the Warp threads breaks, a power actuated loom stop means on the loom including a continuously moving member', a stationary member connected with the loom shipper lever, a normally stationary linger connected to said stationary member and adapted to be engaged by said moving member to stop the loom, a rock shaft having a detent normally engaging said linger to hold the same out of the path of said moving member, and means on said rock shaft for rocking said lieddle frame bar, the

' bar serving when locked to rock said shatt and thereby to permit operation of said sto-p means.

9. In a warp stop motion for looms, the combination With the heddle frame and shed-forming heddles, of a roclable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one of the Warp threads breaks, normally stationary means on the loom adapted to roel: the bar as the lieddle trame moves,

' power actuated means to stop the loom, said means being normally inoperative to stop the loom, means for rendering said stop means operative when the bar is locked against rocking movement` and means for automatically renderingl the stop means inoperative after the loom has once been stopped.

l0. In a Warp stop motion for looms, the combination with the heddle frame and shed-forming heddles, of a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one of the Warp threads breaks, normally stationary movable means on the loom adapted to rock the bar as the heddle frame moves, power actuated means to stop the loom, said means being normally inoperative to stop the loom, means actuatable through said bar rocking means for rendering said stop means operative when the bar is locked against rocking movement, and means for automatically rendering the stop means again inoperative after the loom has been stopped.

l1. In a Warp stop motion for looms, the combination with the heddle frame and sliedt'orming heddles, oit a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one oi the Warp threads breaks, normally stationary movable means on the loom adapted to roclr said bar as the heddle tra-nie moves, power actuated means to stop the leoni, said stop means including a continuously moving member, a relatively stationary member, a connection between said members adapted to be maintained inoperative, means actuatable through said bar rocking means to render said. connection operative, said bar serving when locked to actuate said last mentioned means, and means for automatically returning said connection to inoperative position when the stop 'means has once effected stopping of the loom.

l2. In a Warp stop motion for looms, the combination with the heddle frame and shedforming heddles, of a rockable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement When one ot' the Warp threads breaks, normally stationary movable means on the loom adapted to rock said bar as the heddle frame moves, power actuated means to stop the loom, said stop means including a continuously moving member, a relatively stationary member, a connection between said membersadapted to be held in inoperative position, means operative through said bar rocking means to release said connection, said bar serving when locked to operate said last mentioned means, and means for automatically returning said connection to inoperative position after the stop means has once effected stopping of the loom.

18. In a Warp stop motion :tor looms, the combination with the lieddle frame and shedforming heddles, oit a rockable bar associated With the heddles and mounted in the heddle frame, the heddles being formed to lock the bar against rocking movement when one of the Warp threads breaks, a power actuated loom stop means in the loom including a continuously moving member, a stationary member connected with the loom shipper lever, a normally stationary linger connected to said stationary member and adapted to be engaged by said moving member to stop the loom, and a rock shaft having detent normally engaging said linger to hold the same out of the path of said moving member, means on said rock shaft for rocking said heddle frame bar, the bar serving when looked to rook said shaft and thereby to per-- mit operation of said stop means, and means Jfor automatically effecting the re-engagement of said detent and linger after the stop means has once ell'eeted stopping of the loom.

14k. In a Warp stop motion for looms` the combination With the heddle frame and shedorming heddles, of a roekable bar associated with the heddles and mounted in the heddle frame, the heddles being formed to lool the bar against rocking movement when one of the Warp threads breaks, normally stationary movable means on the loom adapted to rook the bar as the heddle frame moves, power actuated means to stop the loom, said means being normally inoperative to stop the loom, means for rendering said stop means operative when the bar is looked against rocking movement, and means for automatically rendering' the stop means inoperative after the loom has once been stopped.

In testimony whereof I have hereunto set my hand.

HARRY E. KHOURY. 

